Judge Jay had one brother, Peter Augustus Jay, who was thirteen years his senior. Between the brothers there continued through life an uninterrupted affection and confidence. Peter Augustus led an active professional and social life in New York City, holding office as judge, as recorder, and as a member of the State Assembly. On his death, in 1843, high tributes to his ability as a jurist and to his character as a public-spirited citizen were paid by Chancellor Kent, Chief-Justice Samuel Jones, and David B. Ogden. As a member of the Assembly, he was conspicuous in the advocacy of various important measures, among which may be mentioned his efforts to extend the right of suffrage to black citizens of the State. Peter Augustus Jay was not himself prominent in the antislavery cause, but he was generally in sympathy with his brother's work. The Right Reverend A. Cleveland Coxe, Bishop of Western New York, was a frequent visitor in his youth at Bedford. Some extracts from a letter written by him to John Jay afford an interesting view of the domestic life of the Judge's home: "William Jay was one of those true sons of the Republic who inherited sound views of its constitutional system from your illustrious grandfather, and from personal acquaintance with some other fathers of the nation who were high in the confidence of Washington and shared his just and lofty ideas of national policy. Your father was one of those born statesmen who breathed under the inspiration of such ideas, and was animated by them to efforts for the preservation of the Constitution itself in degenerate days. Those were the days when the 'spoils-system' had begun to act with corrosive effect on public affairs and public men. The science of true statesmanship seemed ready to perish. The country fell into the hands of mere politicians, with whom legislation was a trade and a struggle for personal aggrandizement. The epoch had little use for men of pure patriotism, but your father, incapable of ambition or the pursuit of personal ends, stood aside and devoted himself with intrepidity to unpopular principles, of which he foresaw the utility, while he was hardly less prophetic of the cruel war which must be the consequence of popular indifference and blindness to the national perils. He was little seen, but greatly felt, and has left a mark on the diplomacy of his time which is a gain to humanity and to civilization.